Interference Analysis and Subchannel Allocation Schemes in Tri-Sectored OFDMA Systems

2012

IET Commun.

Long-term evolution-advanced (LTE-A), the true 4G technology of third Generation Partnership Project family, has a new feature that aggregates multiple LTE carriers so that users can be served on multiple component carriers (CCs). This characteristic plays an important role to increase data rate multiple times for LTE-A users with corresponding multiple CCs. However, current proposed packet scheduling (PS) algorithms ignore this effect in the effort of providing new solution that increases system performance. The modified proportional fair algorithms proposed in this study can provide optimised algorithm for PS mechanism in LTE-A system as well as other technologies that use multiple carriers.

Section: Packet Scheduling Simulation Programmentioning

confidence: 99%

Optimised proportional fair algorithm for long-term evolution-advanced system with multiple component carriers

Nguyen

2012

IET Commun.

“…It is assumed in this paper that at any time instant, multi-path values vary on each RB whereas pathloss and shadow fading are fixed on each RB. The channel gain (Gain i,,j (t)) of user i on RB j at time t is computed using: (8) where pl i (t) and ξ i (t) are the pathloss and shadow fading gain of user i at time t, respectively and mpath i,j (t) is the multi-path fading gain of user i on RB j at time t. From the computed channel gain, the instantaneous downlink SNR value of user i on RB j at time t (γ i,j (t)) is computed using the approach proposed in [22] as given below:…”

Section: Simulation Environmentmentioning

confidence: 99%

Performance of well known packet scheduling algorithms in the downlink 3GPP LTE system

Ramli

Basukala

2009 IEEE 9th Malaysia International Conference on Communications (MICC)

et al. 2009

137

This paper investigates the performance of well known packet scheduling algorithms developed for single carrier wireless systems from a real time video streaming perspective. The performance evaluation is conducted using the downlink third generation partnership project long term evolution (3GPP LTE) system as the simulation platform. This paper contributes to the identification of a suitable packet scheduling algorithm for use in the downlink 3GPP LTE system supporting video streaming services. Simulation results show that, in the downlink 3GPP LTE system supporting video streaming services, maximum-largest weighted delay first (M-LWDF) algorithm outperforms other packet scheduling algorithms by providing a higher system throughput, supporting a higher number of users and guaranteeing fairness at a satisfactory level.

“…It is assumed in this paper that at any time instant, multi-path values vary on each RB whereas pathloss and shadow fading are fixed on each RB. The channel gain (Gain i,,j (t)) of user i on RB j at time t is computed using: (8) where, pl i (t) and ξ i (t) are the pathloss and shadow fading gain of user i at time t, respectively and mpath i,j (t) is the multi-path fading gain of user i on RB j at time t. From the computed channel gain, the instantaneous downlink SNR value of user i on RB j at time t (γ i,j (t)) is computed using the approach proposed in [18] as given below:…”

Section: Packet Sheduling Algorithmsmentioning

confidence: 99%

Performance analysis of EXP/PF and M-LWDF in downlink 3GPP LTE system

Basukala

Ramli

2009 First Asian Himalayas International Conference on Internet

2009

124

This paper investigates the performance of exponential/proportional fair (EXP/PF) and maximum-largest weighted delay first (M-LWDF) scheduling algorithms in the third generation partnership project long term evolution (3GPP LTE) providing packet-switched multimedia services. It, then, identifies a suitable packet scheduling algorithm on a basis of their performance evaluation. The performance evaluation is conducted in terms of system throughput, average real time (RT) and non-real time (NRT) throughput, packet loss for RT service and fairness for NRT service. The video streaming traffic is used to model the RT service. While, the web-browsing traffic is modelled for NRT service. Simulation results show that at lower load MLWDF algorithm provides better performance than EXP/PF while as the load increases the EXP/PF gives better performance.